Granite setts (blocks) for road surfacing in early 20th century Hong Kong
Granite setts (a sett is a square or rectangular block) were a popular choice for paving Hong Kong's roads in the 1910s and 1920s, especially for roads that had heavy traffic.
The postcard below shows a section of Connaught Road. The road surface has a clear grid pattern that I believe shows it was paved with granite setts.